Couenne::exprDiv Class Reference

class for divisions, $ \frac{f(x)}{g(x)} $ More...

#include <CouenneExprDiv.hpp>

Inheritance diagram for Couenne::exprDiv:
Couenne::exprOp Couenne::expression

List of all members.

Public Member Functions

 exprDiv (expression **al, int n=2)
 Constructor.
 exprDiv (expression *arg0, expression *arg1)
 Constructor with two arguments given explicitly.
expressionclone (Domain *d=NULL) const
 Cloning method.
std::string printOp () const
 Print operator.
CouNumber operator() ()
 Function for the evaluation of the expression.
CouNumber gradientNorm (const double *x)
 return l-2 norm of gradient at given point
expressiondifferentiate (int index)
 Differentiation.
expressionsimplify ()
 Simplification.
int Linearity ()
 Get a measure of "how linear" the expression is (see CouenneTypes.h).
void getBounds (expression *&lb, expression *&ub)
 Get lower and upper bound of an expression (if any).
void getBounds (CouNumber &lb, CouNumber &ub)
 Get value of lower and upper bound of an expression (if any).
exprAuxstandardize (CouenneProblem *p, bool addAux=true)
 Reduce expression in standard form, creating additional aux variables (and constraints).
void generateCuts (expression *w, OsiCuts &cs, const CouenneCutGenerator *cg, t_chg_bounds *=NULL, int=-1, CouNumber=-COUENNE_INFINITY, CouNumber=COUENNE_INFINITY)
 Generate equality between *this and *w.
virtual enum expr_type code ()
 Code for comparisons.
bool isInteger ()
 is this expression integer?
bool impliedBound (int, CouNumber *, CouNumber *, t_chg_bounds *, enum auxSign=expression::AUX_EQ)
 Implied bound processing.
virtual CouNumber selectBranch (const CouenneObject *obj, const OsiBranchingInformation *info, expression *&var, double *&brpts, double *&brDist, int &way)
 Set up branching object by evaluating many branching points for each expression's arguments.
virtual void closestFeasible (expression *varind, expression *vardep, CouNumber &left, CouNumber &right) const
 compute $y^{lv}$ and $y^{uv}$ for Violation Transfer algorithm
virtual bool isCuttable (CouenneProblem *problem, int index) const
 can this expression be further linearized or are we on its concave ("bad") side

Detailed Description

class for divisions, $ \frac{f(x)}{g(x)} $

Definition at line 24 of file CouenneExprDiv.hpp.


Constructor & Destructor Documentation

Couenne::exprDiv::exprDiv ( expression **  al,
int  n = 2 
) [inline]

Constructor.

Definition at line 29 of file CouenneExprDiv.hpp.

Referenced by clone().

Couenne::exprDiv::exprDiv ( expression arg0,
expression arg1 
) [inline]

Constructor with two arguments given explicitly.

Definition at line 33 of file CouenneExprDiv.hpp.


Member Function Documentation

expression* Couenne::exprDiv::clone ( Domain d = NULL  )  const [inline, virtual]

Cloning method.

Reimplemented from Couenne::expression.

Definition at line 37 of file CouenneExprDiv.hpp.

References Couenne::exprOp::clonearglist(), exprDiv(), and Couenne::exprOp::nargs_.

std::string Couenne::exprDiv::printOp (  )  const [inline, virtual]

Print operator.

Reimplemented from Couenne::exprOp.

Definition at line 41 of file CouenneExprDiv.hpp.

CouNumber Couenne::exprDiv::operator() (  )  [inline, virtual]

Function for the evaluation of the expression.

Compute division.

Implements Couenne::expression.

Definition at line 115 of file CouenneExprDiv.hpp.

References Couenne::exprOp::arglist_.

CouNumber Couenne::exprDiv::gradientNorm ( const double *  x  )  [virtual]

return l-2 norm of gradient at given point

Reimplemented from Couenne::expression.

expression* Couenne::exprDiv::differentiate ( int  index  )  [virtual]

Differentiation.

Reimplemented from Couenne::expression.

expression* Couenne::exprDiv::simplify (  )  [virtual]

Simplification.

Reimplemented from Couenne::exprOp.

int Couenne::exprDiv::Linearity (  )  [inline, virtual]

Get a measure of "how linear" the expression is (see CouenneTypes.h).

Reimplemented from Couenne::exprOp.

Definition at line 57 of file CouenneExprDiv.hpp.

References Couenne::exprOp::arglist_, Couenne::CONST, Couenne::NONLINEAR, and Couenne::exprOp::Type().

void Couenne::exprDiv::getBounds ( expression *&  lb,
expression *&  ub 
)

Get lower and upper bound of an expression (if any).

void Couenne::exprDiv::getBounds ( CouNumber lb,
CouNumber ub 
) [virtual]

Get value of lower and upper bound of an expression (if any).

Reimplemented from Couenne::expression.

exprAux* Couenne::exprDiv::standardize ( CouenneProblem p,
bool  addAux = true 
) [virtual]

Reduce expression in standard form, creating additional aux variables (and constraints).

Reimplemented from Couenne::exprOp.

void Couenne::exprDiv::generateCuts ( expression w,
OsiCuts &  cs,
const CouenneCutGenerator cg,
t_chg_bounds = NULL,
int  = -1,
CouNumber  = -COUENNE_INFINITY,
CouNumber  = COUENNE_INFINITY 
)

Generate equality between *this and *w.

virtual enum expr_type Couenne::exprDiv::code (  )  [inline, virtual]

Code for comparisons.

Reimplemented from Couenne::exprOp.

Definition at line 82 of file CouenneExprDiv.hpp.

References Couenne::COU_EXPRDIV.

bool Couenne::exprDiv::isInteger (  )  [virtual]

is this expression integer?

Reimplemented from Couenne::exprOp.

bool Couenne::exprDiv::impliedBound ( int  ,
CouNumber ,
CouNumber ,
t_chg_bounds ,
enum  auxSign = expression::AUX_EQ 
) [virtual]

Implied bound processing.

Reimplemented from Couenne::expression.

virtual CouNumber Couenne::exprDiv::selectBranch ( const CouenneObject obj,
const OsiBranchingInformation *  info,
expression *&  var,
double *&  brpts,
double *&  brDist,
int &  way 
) [virtual]

Set up branching object by evaluating many branching points for each expression's arguments.

virtual void Couenne::exprDiv::closestFeasible ( expression varind,
expression vardep,
CouNumber left,
CouNumber right 
) const [virtual]

compute $y^{lv}$ and $y^{uv}$ for Violation Transfer algorithm

virtual bool Couenne::exprDiv::isCuttable ( CouenneProblem problem,
int  index 
) const [inline, virtual]

can this expression be further linearized or are we on its concave ("bad") side

Reimplemented from Couenne::expression.

Definition at line 108 of file CouenneExprDiv.hpp.


The documentation for this class was generated from the following file:
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines

Generated on 23 Jan 2015 for Couenne by  doxygen 1.6.1